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Approach0 - A math-aware search engine.

Approach0 is a math-aware search engine. Math search can be helpful in Q&A websites: Assume you are fighting a tough question in your homework, spendi
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Category: Vue.js / Projects Using Vue.js
Watchers: 21
Star: 326
Fork: 47
Last update: May 30, 2023
Resource links
http://approach0.xyz
https://github.com/approach0/search-engine

Approach0 is a math-aware search engine.

Math search can be helpful in Q&A websites: Assume you are fighting a tough question in your homework, spending so much time on it without any clue. Yes, you do not simply want an answer, but all you need is some hints. And spending a lot of time on it without any progress is absolutely a desperate experience. It would be very helpful if you can search for similar or identical questions that have been answered on the Q&A websites.

Online demo

Please visit https://approach0.xyz/demo for a WEB demo.

A little history

In 2014, the idea of searching math formulas takes off as a graducate level course project (at University of Delaware).

Later, I am persuaded by my instructor to further do some research work on this, she then became my advisor at that time.

In 2015 summer, my thesis on this topic is submitted.

In 2016, a math-only search engine prototype is published in ECIR 2016.

Shortly after, this Github project is created, the goal was to rewrite most of the code and develop a math-aware search engine that can combine both math formula and text keywords into query.

In late 2016, the first rewritten version of math-aware search engine is complete, it is announced in Meta site of Mathematics StackExchange and top users on that site have acknowledged the usefulness and also provided some good advices.

In 2017, I go back to China and work at Huawei doing a STB (TV box) project, irrelevant to search engine whatsoever.

In 2017 Fall, with an intuition that a math-aware search engine will provide huge value to many people, I gave up my job and continued working on this topic as a PhD student at RIT. During the first two years of my PhD study, I have kept improving the effectiveness and efficiency of the formula retrieval model.

In 2019, the new model has brought me my first research full paper at ECIR 2019 conference (and a best application paper award!).

In May 2019, the new model has been put online, it has indexed over 1 million posts and there are only 3 search instances running on two low-cost Linode servers.

In early 2020, a paper focusing on efficiency has just been accepted at ECIR 2020 conference, this paper shows our system is the first one to produce very effective math search results with practical query runtimes.

Documentation

Please check out our documentation for technical details: https://approach0.xyz/docs

License

MIT

Updates (May 24, 2019)

Currently, this master branch is inactive, although the research branch has an early version of the new model, it only supports math queries. The most updated code is closed source, it features very effective math-aware search and further supports text queries. The new system can search on 1 million documents in real time, hosted by only two low-cost servers. For information on the most recent development, please email wxz8033 AT rit.edu or contact me via WeChat (hellozhongwei).

2 Open More issues
Closed

AoPS (Art of Problem Solving) forum crawler

Made a simple AoS crawler, it works by specifying either single post, or time range (currently relative dates, not absolutes). Also the AoS forums do not work on same principle as the MathSE, thats why I use time (number of days) rather than number of pages. Also I had to use ajax php requests since that is the way the data are fetched.

Anyway few examples to try: -c 6 -p 1639347 This fetches https://artofproblemsolving.com/community/c6h1639347_sum_of_squares .

-c 7 -n 0 -o 7 This fetches posts from category 7 (https://artofproblemsolving.com/community/c7), posts that are 7 days old

-c 7 -n 7 -o 14 This fetches posts from category 7 (https://artofproblemsolving.com/community/c7), posts that are 7-14 days old

Few considerations: The relative time API might not be best, could be perhaps improved by using absolute times, could improve this in the future. I see biggest challenge with organizing these different forums categories, but it seems you can just fetch following threads to get vas majority of posts on AoS: -c 3 (Middle School Math, > 33k posts) -c 4 (High School Math > 71k posts) -c 5 (Contests & Programs > 17k posts) -c 6 (High School Olympiads > 214k posts) -c 7 (College Math > 78k posts)

Also the folders and files layout, I have added prefix aos to files in order todistinguish between SE and Aos posts, you might want to adjust that.

I am using few more libs though, slimit for javascript parsing and certifi since on my machine the SSL links did not work (maybe Windows only issue, I dont know). Also along the way I encountered few issues witn encoding and parsing even the Math.SE posts, so I fixed those, but feel free to ommit/remove it, but I believe it improved the parser.

Although it works fine, I imagine there might be some additional updates, such as putting common crawlers stuff into common file, but I mainly botherred with functionality at this point, to get this going.

opened May 8, 2018 by TheSil 14
Closed

AoPS crawler is not working.

I have not used AoPS crawler for several months. However, (since I am playing with Docker swarm) today I run into AoPS crawler issue:

./crawler-artofproblemsolving.com.py  -n 0 -o 3650 -c 3
WARNING: Couldn't write lextab module <module 'slimit.lextab' from '/usr/local/lib/python3.7/dist-packages/slimit/lextab.py'>. Won't overwrite existing lextab module
WARNING: yacc table file version is out of date
WARNING: Token 'BLOCK_COMMENT' defined, but not used
WARNING: Token 'CLASS' defined, but not used
WARNING: Token 'CONST' defined, but not used
WARNING: Token 'ENUM' defined, but not used
WARNING: Token 'EXPORT' defined, but not used
WARNING: Token 'EXTENDS' defined, but not used
WARNING: Token 'IMPORT' defined, but not used
WARNING: Token 'LINE_COMMENT' defined, but not used
WARNING: Token 'LINE_TERMINATOR' defined, but not used
WARNING: Token 'SUPER' defined, but not used
WARNING: There are 10 unused tokens
WARNING: Couldn't create <module 'slimit.yacctab' from '/usr/local/lib/python3.7/dist-packages/slimit/yacctab.py'>. Won't overwrite existing tabmodule
[curl] /community/
Traceback (most recent call last):
  File "./crawler-artofproblemsolving.com.py", line 483, in <module>
    main(sys.argv)
  File "./crawler-artofproblemsolving.com.py", line 466, in main
    extra_opt)
  File "./crawler-artofproblemsolving.com.py", line 350, in crawl_category_topics
    for category, topic, e in list_category_topics(category, newest, oldest, c):
  File "./crawler-artofproblemsolving.com.py", line 264, in list_category_topics
    session = parsed['AoPS.session']
TypeError: 'NoneType' object is not subscriptable

It looks like AoPS has changed its API, It also could be my network is blocking AoPS, I have not tested yet.

@TheSil IF you get time, please help me and see if you can reproduce this issue, thanks!

opened Oct 10, 2020 by w32zhong 13
Closed

Links are in HTTP, they should be by HTTPS by default

opened Nov 4, 2016 by poccouy 10
Closed

Filtering results by source

I thought I would create an issue for this. Sometimes it would be nice to filter which sources I want to display (some other MSE users expressed this request).

opened Sep 22, 2020 by TheSil 6
Closed

Activating Open Collective

Hi, I'm making updates for Open Collective. Either you or another core contributor signed this repository up for Open Collective. This pull request adds financial contributors from your Open Collective https://opencollective.com/search-engine ❤️

What it does:

  • adds a badge to show the latest number of financial contributors
  • adds a banner displaying contributors to the project on GitHub
  • adds a banner displaying all individuals contributing financially on Open Collective
  • adds a section displaying all organizations contributing financially on Open Collective, with their logo and a link to their website

P.S: As with any pull request, feel free to comment or suggest changes.

Thank you for your great contribution to the Open Source community. You are awesome! 🙌 And welcome to the Open Collective community! 😊

Come chat with us in the #opensource channel on https://slack.opencollective.com - great place to ask questions and share best practices with other Open Source sustainers!

opened Sep 2, 2019 by monkeywithacupcake 5
Closed

Is there a public web-demo for approach0?

opened Apr 16, 2019 by physikerwelt 4
Open

Unexpected Mathjax error in SERP

Search results page

  • Entry number 8 has an error in two mathjax displays ("Missing close brace" and "Extra close brace or missing open brace" respectively).
  • this is a screenshot image
  • the original post on MSE is free from any mathjax error though
  • A similar problem exists for entry 7 as well
  • I could not come up with any possible reason for this

Broken Mathjax of entry 8 copy-pasted for reference:

...Put it this way \int {\frac{x}{{\sqrt { ... t {\frac{{2ax + b}}{{\sqrt {a{x^2} + bx + c} }}dx}  - \frac{b}{{2a}}\int {\frac{{dx}}{{\sqrt {a{x^2} + bx + c} }}} 
\displaystyle \frac{c}{a} - \frac{{{b^2}}}{{4{a^2}}} < 0 =  -  ... 2}.
opened Feb 23, 2018 by GaurangTandon 2
Open

Parentheses

The search engine can't associate e.g. this: \arcsin{\frac{a}{b}} with this: \arcsin{\left(\frac{a}{b}\right)}

opened Apr 7, 2017 by bsfsfn 1

1.0.0(Sep 24, 2016)

First version.

Contents

    Jia-Research-Lab Scale-aware Automatic Augmentation for Object Detection (CVPR 2021)
    vthommeret Math to Code is an interactive Python tutorial to teach engineers how to read and implement math using the NumPy library.
    flintlok A Python-based application demonstrating various search algorithms, namely Depth-First Search (DFS), Breadth-First Search (BFS), and A* Search (Manhattan Distance Heuristic)
    TechyNilesh Deep Image Search is an AI-based image search engine that includes deep transfor learning features Extraction and tree-based vectorized search.
    cweiske Self-hosted search engine for your static blog
    semi-technologies Semantic search through a vectorized Wikipedia (SentenceBERT) with the Weaviate vector search engine
    hyeseonko Mini Search Engine with Python - assume there are 10 documents
    guyuchao Official implementation of ICCV2021 "iNAS: Integral NAS for Device-Aware Salient Object Detection" & Open Source Neural Architecture Search Toolbox for Device-aware Salient Object Detection
    lwdgit gitbook powerful search plugin
    Famous Famous Engine a free and open source JavaScript rendering engine.
    MayloIFERR RACF (Recency Aware Collaborative Filtering) is the implementation of the "Recency Aware Collaborative Filtering for Next Basket Recommendation" original paper. which is a set of collaborative filtering approaches for solving the problem of predicting the Next Basket Recommendation.
    yacy Distributed Peer-to-Peer Web Search Engine and Intranet Search Appliance
    OpenGenus Stay happy while offline | World's first offline search engine.
    RD17 :mag: Ambar: Document Search Engine
    josdejong An extensive math library for JavaScript and Node.js
    goessner LaTeX Math for Markdown inside of Visual Studio Code.
    felselva Pure C math library for 2D and 3D programming
    unconed Presentation-quality WebGL math graphing
    efloti Plugin to edit math using (La)TeX (rendered by mathjax) inside draft-js(-editor-plugin). Demo:
    romainguy Set of Kotlin APIs to make graphics math easier to write
    KaTeX Fast math typesetting for the web.
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